Large Scale Oxidized Graphene Production for Industrial Applications

a technology of industrial applications and oxidized graphene, which is applied in the direction of graphene, carbon compounds, and nano-carbons, can solve the problems of method producing an output substantially limited to substantially flat graphene flakes and water

Active Publication Date: 2017-11-23
UNIV OF CENT FLORIDA RES FOUND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention relates to a method of making graphene oxide by mechanically exfoliating graphite into flat graphene flakes using an oxidizing agent with an oxidation potential less than 2V. The resulting graphene flakes are then separated from the water. The method can produce an output with a high percentage of flat graphene flakes and water. The oxidizing agent can be CO2, O2, steam, N2O, NO, NO2, O3, ClO2, or H2O2. The pH of the water containing the oxidized graphene flakes can range from 2 to 9. The method can also involve precipitating any remaining graphite by increasing the pH of the mixture. The technical effect of this invention is the ability to efficiently produce flat graphene flakes with a high yield and purity.

Problems solved by technology

In another aspect, the method produces an output that is substantially limited to substantially flat graphene flakes and water.
In another aspect, the method produces an output that is substantially limited to substantially flat graphene flakes and water.

Method used

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Examples

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Embodiment Construction

[0012]While the making and using of various embodiments of the present invention are discussed in detail below, it should be appreciated that the present invention provides many applicable inventive concepts that can be embodied in a wide variety of specific contexts. The specific embodiments discussed herein are merely illustrative of specific ways to make and use the invention and do not delimit the scope of the invention.

[0013]To facilitate the understanding of this invention, a number of terms are defined below. Terms defined herein have meanings as commonly understood by a person of ordinary skill in the areas relevant to the present invention. Terms such as “a”, “an” and “the” are not intended to refer to only a singular entity, but include the general class of which a specific example may be used for illustration. The terminology herein is used to describe specific embodiments of the invention, but their usage does not delimit the invention, except as outlined in the claims.

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Abstract

Existing methods of producing high quality graphene / graphite oxides are generally accomplished by exfoliating graphite into flakes and oxidizing the graphite flakes with strong oxidizers under extreme conditions and require careful purification. The oxidizers are typically strong acids used in high concentrations at elevated temperatures requiring complicated purification processes to yield oxidized graphene / sheets. The existing processes can cost up to $12,000 / gram. This invention uses a mild oxidant combined with mechanical processing where the sole products are oxidized graphite / graphene and water without the need for further purification.

Description

PRIORITY CLAIM AND CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This patent application is a continuation of U.S. patent application Ser. No. 14 / 772,898 filed on Sep. 4, 2015; which claims priority to the International Patent Application Ser. No. PCT / US2014 / 021810, filed on Mar. 7, 2014, which claims the benefit of U.S. Provisional Application Ser. No. 61 / 774,633, filed Mar. 8, 2013, each of which is hereby incorporated by reference in its entirety.TECHNICAL FIELD OF THE INVENTION[0002]The present invention relates in general to the field of graphene manufacturing, and more particularly, to large scale oxidized graphene production for industrial applications.BACKGROUND OF THE INVENTION[0003]Without limiting the scope of the invention, its background is described in connection with composite materials.[0004]U.S. Pat. No. 8,580,132, issued to Lin, et al., is directed to a method for making strip shaped graphene layer. Briefly, these inventors describe a method for making a strip shape...

Claims

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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): C01B32/198C01B32/19C01B32/194
CPCC01B32/19C01B32/194C01B32/198C01B32/23C01B32/192C01B32/182
InventorBLAIR, RICHARD
OwnerUNIV OF CENT FLORIDA RES FOUND INC